Jeep Wrangler Can Interior Bus

General discussion about interfacing with the CAN bus
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ve7it
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Joined: 2010 Oct 25 20:14

Jeep Wrangler Can Interior Bus

Post by ve7it »

While doing some cruising through the 2007 Wrangler service manual, I found that the CAN interior bus (radio, amp, dash cluster, Intrusion transceiver module) is available on the OBDII connector as listed below:
  • Pin 3 CIB+ (interior bus)
  • Pin 11 CIB-
  • Pin 6 Diagnostic CAN C+ (normal OBDII CAN connections)
  • Pin 14 Diagnostic CAN C-
  • Pin 16 +12
  • Pin 4,5 ground
  • Pin 7 SCI transmit
This is great news as one doesnt have to tap into the radio harness to access the CAN interior bus. A DPDT toggle switch in your OBD harness would allow an ELM327 based monitor to work either with the OBDII functions or to eavesdrop on the CIB.
I wonder how many post 2007 vehicles have pins 3 and 11 populated in the OBDII connector... have a look and update this post with what you find.
Bummer :cry: my 2010 Wrangler only has Pins 4,5,6,14 and 16 populated, so the CIB has to be accessed through the central gateway in the TIPM or a harness hack.
nr0x
What's hacking?
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Joined: 2014 Jun 19 08:55

Re: Jeep Wrangler Can Interior Bus

Post by nr0x »

my 2014 Wrangler Unlimited also has pins 4,5,6,14, and 16 pins populated on the OBD2 port.
tuckie
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Joined: 2015 Mar 10 19:12

Re: Jeep Wrangler Can Interior Bus

Post by tuckie »

Just checked my 2015 wrangler, no such luck for the Interior bus on the OBD2 port either.
psyolent
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Joined: 2018 Apr 25 18:58

Re: Jeep Wrangler Can Interior Bus

Post by psyolent »

The 2012 JK doesn't have the CAN-IHS on the OBD2 plug, it only drops CAN-C from the TIPM. You have to jack into a device eg: the radio or at the TIPM directly itself to see the data. You'd struggle with a ELM327 due to the amount of data it throws out.
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